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  1. Apache Jena
  2. JENA-1586

Fuseki does not close files of dataset when the dataset is removed

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: Jena 3.6.0
    • Fix Version/s: Jena 3.9.0
    • Component/s: Fuseki
    • Labels:
      None
    • Environment:

      Debian 9.5 with Jena 3.6.0

      Description

      When you remove a TDB-dataset over HTTP from the Fuseki server, Fuseki does not close the file. 

      Steps to reproduce:

      First: create a dataset over HTTP with name 'x'. Then, delete the dataset with name 'x'. Now inspect the open files of the fuseki process by running lsof -p <FUSEKI_PROCESS_ID> you see that a dataset with name 'x' is  still opened by the Fuseki-process.

      Impact:

      When a Fuseki process runs for a long time, and many datasets are created and deleted, it will in the end lead to a situation in which you cannot create new datasets anymore. Each attempt to creating a dataset will lead to a HTTP response code 500 with message 'java.nio.file.FileSystemException: /var/lib/fuseki/templates/config-tdb: Too many open files'. Also, keeping the files open leads (I suspect) to a higher memory usage than strictly needed.

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              • Assignee:
                andy Andy Seaborne
                Reporter:
                tomdenbraber Tom den Braber
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                Dates

                • Created:
                  Updated:
                  Resolved: